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research:contact_mics [2017/03/19 00:52] – [Impedance] mrkvaresearch:contact_mics [2017/03/19 01:29] – [Credits] mrkva
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 [[http://hosatech.com/product/mit-129/|Hosa]] makes a typical adapter to convert from 50 kΩ, the typical impedance of the magnetic pickup of an electric guitar, to 200 Ohms, the typical input impedance of an audio mixer. This unit is hence not optimized for piezo disks, but might provide a partial solution. [[http://hosatech.com/product/mit-129/|Hosa]] makes a typical adapter to convert from 50 kΩ, the typical impedance of the magnetic pickup of an electric guitar, to 200 Ohms, the typical input impedance of an audio mixer. This unit is hence not optimized for piezo disks, but might provide a partial solution.
  
-An **active impedance converter** contains an actual amplifier circuit, based on either Field Effect Transistors (FETs), op-amps, or a vacuum tube. Active impedance converters may be powered by batteries (DC), a standard outlet (AC), or the phantom power provided by the mixer. Active impedance converters are more complicated and are often more expensive than their passive counterparts, but they can be highly optimized to their task. By using a proper active impedance converter with your piezo contact microphone, characteristics of the mixer, particularly how much clean gain is available, become less critical.+An **active impedance converter** contains an actual amplifier circuit, based on either Field Effect Transistors (FETs), op-amps, or a vacuum tube. Active impedance converters may be powered by batteries, a standard outlet, or the phantom power provided by the mixer or the recorder. Active impedance converters are more complex and are often more expensive than their passive counterparts, but they can be highly optimized to their task. By using a proper active impedance converter with your piezo contact microphone, characteristics of the mixer, particularly how much clean gain is available, become less critical.
  
 Video exploring the effects of active impedance converter: Video exploring the effects of active impedance converter:
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 ==== Credits ==== ==== Credits ====
  
-Authors, editors and contributors (listed alphabetically): +Authors, editors and contributors (listed alphabetically):\\ 
-Jonas Gruska, Jerry Lee Marcel, Robin Parmar, Terry Setter+Jonas Gruska, Jerry Lee Marcel, Robin Parmar, Terry Setter\\ 
 +Videos by Jonas Gruska